Portable fitness trainer



FIG. 1 is an isometric top left view of the portable fitness trainer showing my new design;

FIG. 2 is an isometric bottom view of FIG. 1 thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a front elevation view thereof, the rear view being a mirror image thereof;

FIG. 5 is a right elevation view thereof, the left view being a mirror image thereof; and,

FIG. 6 is a bottom plan view thereof. 

CLAIM The ornamental design for a portable fitness trainer, as shown and described. 